import type { PGQuery } from './client';
/**
 * A _function_ capable of converting a template string into a {@link PGQuery}
 * like structure (tagged template literals).
 *
 * For example:
 *
 * ```typescript
 * const email = 'user@example.org'
 * const query = SQL `SELECT * FROM users WHERE email = ${email}`
 *
 * // Here "query" will be something like:
 * // {
 * //   query: 'SELECT * FROM users WHERE email = $1',
 * //   params: [ 'user@example.org' ],
 * // }
 * ```
 *
 * The `SQL` function can also be use with _concatenated_ template strings, for
 * example:
 *
 * ```typescript
 * const email = 'user@example.org'
 * const hash = 'thePasswordHash'
 * const query = SQL
 *     `SELECT * FROM users WHERE email = ${email}`
 *     `AND password_hash = ${hash}`
 *
 * // Here "query" will be something like:
 * // {
 * //   query: 'SELECT * FROM users WHERE email = $1 AND password_hash = $2',
 * //   params: [ 'user@example.org', 'thePasswordHash' ],
 * // }
 * ```
 *
 * In this case, multiple template strings will be concatenated with a single
 * space character.
 */
export interface SQL extends Required<PGQuery> {
    (strings: readonly string[], ...args: any[]): SQL;
}
/**
 * A _function_ capable of converting a template string into a {@link PGQuery}
 * like structure (tagged template literals).
 *
 * For example:
 *
 * ```typescript
 * const email = 'user@example.org'
 * const query = SQL `SELECT * FROM users WHERE email = ${email}`
 *
 * // Here "query" will be something like:
 * // {
 * //   query: 'SELECT * FROM users WHERE email = $1',
 * //   params: [ 'user@example.org' ],
 * // }
 * ```
 *
 * The `SQL` function can also be use with _concatenated_ template strings, for
 * example:
 *
 * ```typescript
 * const email = 'user@example.org'
 * const hash = 'thePasswordHash'
 * const query = SQL
 *     `SELECT * FROM users WHERE email = ${email}`
 *     `AND password_hash = ${hash}`
 *
 * // Here "query" will be something like:
 * // {
 * //   query: 'SELECT * FROM users WHERE email = $1 AND password_hash = $2',
 * //   params: [ 'user@example.org', 'thePasswordHash' ],
 * // }
 * ```
 *
 * In this case, multiple template strings will be concatenated with a single
 * space character.
 */
export declare function SQL(strings: readonly string[], ...args: readonly any[]): SQL;
/** Escape a PostgreSQL identifier (table, column, ... names) */
export declare function escape(str: string): string;